161903934 has 40 divisors (see below), whose sum is σ = 372603528. Its totient is φ = 52507440.

The previous prime is 161903933. The next prime is 161903939. The reversal of 161903934 is 439309161.

161903934 is a `hidden beast` number, since 1 + 619 + 0 + 3 + 9 + 34 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161903933) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7512 + ... + 19499.

Almost surely, 2^161903934 is an apocalyptic number.

161903934 is an abundant number, since it is smaller than the sum of its proper divisors (210699594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161903934 is a wasteful number, since it uses less digits than its factorization.

161903934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27062 (or 27053 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 161903934 is about 12724.1476728306. The cubic root of 161903934 is about 545.0284012918.

The spelling of 161903934 in words is "one hundred sixty-one million, nine hundred three thousand, nine hundred thirty-four".